Lahnenwiesgraben

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Lahnenwiesgraben
Catchment area of ​​the Lahnenwiesgraben

Catchment area of ​​the Lahnenwiesgraben

Data
Water code DE : 16252
location District of Garmisch-Partenkirchen , Upper Bavaria , Bavaria , Germany
River system Danube
Drain over Loisach  → Isar  → Danube  → Black Sea
origin Enningsattel
47 ° 31 '29 "  N , 11 ° 0' 26"  O
Source height 1556  m above sea level NN
muzzle in the Loisach near Burgrain Coordinates: 47 ° 30 '52 "  N , 11 ° 6' 15"  E 47 ° 30 '52 "  N , 11 ° 6' 15"  E
Mouth height 681  m
Height difference 875 m
Bottom slope 98 ‰
length 8.9 km
Catchment area 19.02 km²
Communities Garmisch-Partenkirchen , Farchant
Lahnenwiesgraben below the Reschbergwiesen

Lahnenwiesgraben below the Reschbergwiesen

The Lahnenwiesgraben (also Lahnewiesgraben ) is a brook in the southeastern Ammergau Alps that flows east and flows into the Loisach in the north of Garmisch-Partenkirchen ( Burgrain district ) .

Catchment area and course

The approximately 19 square kilometer catchment area of the Lahn meadows trench on the north by Windstierlkopf , Front head fields and Brünstelskopf , to the west by Enningsattel and to the south by Hirschbichel , Kramerspitz and Königstand framed.

In the upper reaches the Lahnenwiesgraben has different names. It rises as a ditch from a spring pool not far from the Enningalm hut . After the confluence of the Red Trench orographically from the right, it is called Sulzgraben (also Wiesgraben ). Only from the inflow of the Stepberggraben, also orographically from the right, does the brook bear the name Lahnenwiesgraben. This absorbs the water of other streams (from right: Neuweidlahner, Schneckengraben, from left: Herrentischgraben, Bachgraben, as well as other nameless streams) before it reaches the valley floor of the Loisach near Burgrain . Shortly before the mouth nor the Schwaig digging the drainage of flows to right, nurse lake . The confluence with the Loisach was swiveled slightly to the north in 2016/17 in order to avoid a backwater of the Lahnenwiesgraben when the Loisach floods in the settlement area of ​​Burgrain.

Hydrology and geology

In the years 2000 to 2005 the mean discharge (MQ) near the mouth in Burgrain fluctuated between 0.32 and 0.64 m³ / s. The highest discharge (HQ) during this period was 16.77 m³ / s.

From a geological point of view, the valley of the Lahnenwiesgraben lies in a tectonic hollow (Lahnenwies-Mulde) in which calcareous alpine sediments from the Upper Triassic and Jura have been preserved. The valley is shaped by the alpine limestone ( norium ) and the somewhat younger marls of the Kössen formation ( rhaetium ). The latter are characterized by their wealth of fossils . There are many fossil finds in the area of ​​the Fleckgraben and in the mouth area of ​​the Schneckengraben.

Due to the susceptibility of the rocks to erosion, the Lahnenwiesgraben including its headwaters is blocked by many Mur and bed load barriers and was the subject of scientific studies on mass movements in the past .

tourism

A forest road leads through the valley of the Lahnenwiesgraben to the Enningalm. This is managed in summer, but without overnight accommodation. The Enningalm is a popular destination , especially for mountain bikers . A hiking trail runs parallel to the forest road . Beyond the Enningsattel you can take a narrow path ( single trail ) over the Rotmoosalm to Griesen .

More photos

  • Source pool of the Fleckgraben near the Enningalmhütte (left)

  • Whitewater control at the Sulzgraben

  • View over the Bachgraben and the Reschbergwiesen into the valley of the Lahnenwiesgraben

  • The Lahnenwiesgraben flows into the Loisach (from the right). In the background the Hohe Fricken

Web links

Commons : Lahnenwiesgraben  - Collection of images, videos and audio files

Individual evidence

  1. ↑ a b List of brook and river areas in Bavaria - Isar river area, page 18 of the Bavarian State Office for the Environment, as of 2016 (PDF; 2.5 MB)
  2. ↑ Merkur Online from November 8, 2016
  3. ↑ D. Morche: Investigations on the fluvial sediment transport in catchment areas of the northern Limestone Alps (Reintal / Wetterstein Mountains and Lahnenwiesgraben / Ammergau Alps), dissertation Martin Luther University Halle-Wittenberg, 2008 (pdf)
  4. ↑ Explanations of the Geological Map of Bavaria, 1: 25000, sheet 8432 (pdf)
  5. ↑ Andreas P. Kaiser: geotrekking Zugspitzland, Rother hiking book, 2013, ISBN 978-3-7633-3087-4
  6. ↑ F. Koch: On the spatiotemporal variability of mass movements and pedological mapping in Alpine catchment areas - Dendrogeomorphological case studies and explanations of the soil maps Lahnenwiesgraben and Reintal, 2004 (pdf)
  7. ↑ D. Keller: Analysis and modeling of gravitational mass movements in alpine sediment cascades with special consideration of creeping and sliding movements in unconsolidated rock (Lahnenwiesgraben, Garmisch-Partenkirchen), 2009 (pdf)